Direct-Conversion TV Tuner

_______________________________________________________________________________________

9

-45

-55

-65

-75

020

10

30

40

50

STOPBAND NOISE vs. FREQUENCY

FREQUENCY (MHz)

BB_BW <3:0> = "1011"

8MHz CHANNEL MODE

BB_BW <3:0> = "1001"

7MHz CHANNEL MODE

0

10

5

20

15

25

30

VHF MODE NOISE FIGURE

vs. BB_AGC VOLTAGE

BB_AGC VOLTAGE (V)

0

1.0

1.5

0.5

2.0

2.5

3.0

°C

°C

°C

°C

220MHz

RF_AGC = 2.85V

0

10

5

20

15

25

30

UHF MODE NOISE FIGURE

vs. BB_AGC VOLTAGE

BB_AGC VOLTAGE (V)

0

1.0

1.5

0.5

2.0

2.5

3.0

620MHz

RF_AGC = 2.85V

°C

°C

°C

°C

0

10

5

15

30

35

25

20

40

100

300 400 500 600

200

700 800 900 1000

RF PORT-TO-PORT ISOLATION

FREQUENCY (MHz)

RFIN2 TO RFIN

RFIN TO RFIN2

4

3

2

1

0

-60

-30

-50

-40

-20

-10

0

POWER-DETECTOR OUTPUT VOLTAGE

vs. RF INPUT POWER

RF INPUT POWER (dBm)

10k

Ω PULLUP TO 3.0V

"111"

"000"

0

-5

-10

-15

450

675

525

600

750

825

900

RF INPUT RETURN LOSS

vs. UHF FREQUENCY

UHF FREQUENCY (MHz)

Zo = 75

Ω

Typical Operating Characteristics (continued)

0

-5

-10

-15

-20

150

200

175

225

250

RF INPUT RETURN LOSS

vs. VHF FREQUENCY

VHF FREQUENCY (MHz)

Zo = 75

Ω

200

195

190

185

3.0

3.3

3.1

3.2

3.4

3.5

3.6

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

°C

°C

°C

°C

°C